Improved hinge



einem 5mm! new eine.

JOHN D. SHEPARD AND RICHARD W. ENGLISH, OF BUFFALO, NEW YORK, ASSGNORSTO JOHN D. SHEPARD.

Leners 'Patent No. 92,662, zaad .my 13, 1869.

IMPROVED HINGE.

The Schedule referred te in these Letters Patent andk making part 0f thesame.

To all whom 'it may concern:

Be. it known 'that we, JOHN D.-SHEPARD and Rion- ARD W. ENGLISH, of thecity of Buffalo, in the county of Erie, and State of New York, haveinvented a cer-- tain new ,and useful Improvement in Self-LockingBlind-Hinges; and We do hereby declare that the'following is a full andexact description thereof, reference being had to the accompanyingdrawings, making part of this specification, in which- Figure 1 is a topplan 4view of thel lower pair of hinges, with the blind closed.

Figure 2 is an edge view of the same, with the blind open.

Figure 3 is a top plan view of the lower leaf, with the pintle of theother leaf shown in section on the line x-x of iig. 2.

Figure 4is a plan view of the lower leaf, looking from below upward, andrepresents the position in which the pattern is placed in the mould forcasting.

Our invention consists in the special manner or form of constructing thelower pair of hinges for blinds, whereby they are rendered"automaticallydouble-locking, when the blind is thrown open.

Aln constructing our improved hinge, wemake two leaves, C and C', eachhaving formed thereon a vcrtical plate, or flange, a, by which they aresecured to the blind and the casing, respectively, inthe usual manner,so that the leaves Gand C' shall project at right angles from the flangea, and a horizontal plane, as represented in fig. 2.

These leaves O and' C are both made of the same form on their periphery,as represented in figs. 3 and 4, they being eccentric or cam-shaped ontheir rear edge, and having an oi'set, o1' shoulder, g, formed on theirouter edge, at a point directly opposite, and ,inl

line with the rear edge ofthe ange a, as shown clearly in fig. 3.

The adjoining faces of theleaves C and C are both` made dat, with theexception that each has on its rear portion a small flat projection, h,each"edge of. which is inclined, as shown vin figs. 2, 3, and4, theseprojections heilig so located, that when the blind is. opened they shallpass one over the other, and have their inner inclined edges lock overor against each other, as'v shown at e, iig. 2, when the blind isthrownentirely open.

The lower leaf G is made with an elongated opening, .or hole, c, asshown in fig. 3, the longer diameter of this opening ,standing at rightangles to the Wall,

or easing A, as there represented.

The upper leaf C has' a pintle, d, projecting from thccentre of itslower face vertically, to it into the hole c, and near the lower end ofthis pintle is a projection, f, .standing out horizontally, as shown infigs. 2, 3, and 4.

This projection, or lug f is made of such a size as to permit the pintled, with it on, to be inserted through the hole c, when turned the longway of the hole, and lock u nder the leaf C when turned around.

The other hinge of zthe blind may be of any suitaf ble form, or it maybe a duplicate of the lone above described; and though we have spoken ofthis as the bottom hinge, itis obvious that it may be placed at the top,with equal facility and benefit.

lVith a hinge thus constructed, and applied to the blind in the usualmanner, theV operation is as follows:

As the blind is swung open, the projections h ride one over the other,and just as the blind reaches thel point where it is to stop, theinclines e of the projections 71., working ou each other, draw the blindB inl shown in iig. 2, the locking thus being double and automatic inoperation.

To unlock the blind or hinge, as is necessary to close it, the bottomkof the blind B is shoved outward from the Wall, the incline e of theupper leaf riding up on the corresponding incline of the lower leaf, theoutward movement withdrawing the shoulders y from behind the edges ofthe anges a, when the blind is swung around and closed.

By this manner of forming the hinge, we produce a very cheap, effective,strong, and durable hinge, and, onethat can be cast complete, with thescrew-holesl in, ready for use. y f

We are aware that hinges` have heretofore been made With elongatedopenings, and with a shoulder on one leaf for locking the blindopen,.and, therefore, we do not claim them, broadly; but, having 'thusdescribed our invention,

lVhat we claim, is-

A hinge,'having its leaves provided with the two projections, orinclines h, and the two shoulders g, arranged to lock against therearedges of the flanges a, substantially as described, whereby the hinge isrendered automatically double-locking, as set forth.

In witness whereof, We `have hereunto signed our names, in the presenceof twosubscribing witnesses.

JOHN D. SHEPARD. RICHARD W. ENGLISH.

lVitnesses:

W. J. CHAMBERLIN, J. R. BRAKE.

